Files That You Copy to a Locally Mapped Drive Are Copied Slowly (260091)


The information in this article applies to:

  • Microsoft Windows NT Server 4.0 Terminal Server Edition
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Server 4.0
This article was previously published under Q260091

SYMPTOMS

When you locally map a drive to a computer by specifying a Universal Naming Convention (UNC), files that you copy are significantly slower than files that you copy directly to a local drive.

CAUSE

This behavior occurs because loop-back UNC connections have overhead that is introduced by RDR, Transmission Control Protocol/Internet Protocol (TCP/IP), SRV, and other drivers, while files that you copy locally are copied directly to the file system.

RESOLUTION

To resolve this behavior, do not copy files to local shares; either use a drive letter and folder or use the subst command so that you can use a drive letter to point to a local folder.

STATUS

This behavior is by design.
Modification Type:MajorLast Reviewed:6/30/2004
Keywords:kbenv kbfile kbnetwork kbprb KB260091
©2004 Microsoft Corporation. All rights reserved.